Minnesota State Capitol Complex
The Minnesota State Capitol Complex is the first in the nation to be heated and cooled primarily by green energy produced at a combined heat and power plant adjacent to District Energy's facility. The complex includes more than 12 buildings located just north of downtown Saint Paul. Most of the buildings were connected to the downtown district heating system in the early 1980s when the system first became operational. In 2005, the State connected its original Capitol Complex buildings and several new facilities to the downtown district cooling system, which began operating in 1993.
The State Capitol Complex is District Energy's largest single customer in the downtown Saint Paul area. The largest building in the complex, the Minnesota State Capitol, was designed by Cass Gilbert and modeled after Saint Peter's Basilica in Rome. The building's unsupported marble dome is the second largest in the world, after Saint Peter's. Above the building's southern entrance is a gilded quadriga called The Progress of the State. Work on the capitol began in 1896 and was completed in 1905. The building was added to the National Register of Historic Places in 1972.
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